Shaper



June 14, 1927.

R. T. HAzELToN SHAPER mea Aug. 25. 1924 5 Sheets-Sheet 1 June 14,1927. f l 1,632,375

y R. T. HAZELTON SHAPER Filed Aug. 25. 1924 5 sheets-sheet 2 u l ml "1,632, 75 June 14 1927 R. T. HAzELToN v sHAPER Filed Aug. 25. 1924 SSheets-Sheet 4 14 ummmugla /////////////////////////%%fhlll| Il'Il V f I jill um i .f w

June 14, 1927.

R. T. HAZELTON SHAPER Filed Aug 25. 1924 5 Sheets-Sheet 5 zim . for converting continuous rotary into in-.

Panarea June 14, 1927. y

UNITED STATES PATENT loF-Flcr.,

ROBEBT '.li. HvAZELTON, 0l CLEVELAND, OHIO, ASSIGNOR TO THE CDCINNTI Y y COMPANY, OF GINGINNATI, 0R10, CORZEORATION OF OHIO.

SHAPEE.

applicano; mea Angus: 25, i924. serial no. nasse.

This invention relates 'to improvements. in metal working machines and is particularly directed to improvements in metal shapers, a general object' of the invention being pro- .vide improved carriage feed transmlssion mechanism, in which the rotary motion of the bull gear shaft isfconverted intointermittent, reversible, ;rotary`V motion ofthe cross-feed shaft of the carriage in, synchronism with the ram.

In a machine of the above character, a

ratchet mechanism is usually employed for intermittently rotating the carriage crossgear shaft. Moreover, the york holding carriage is ordinarily fed during the retreat or non-cutting stroke of the 'ram and itv is therefore necessary that the. carriage feed movement be coordinated 'to that of the ram, in either direction of move1nent, an d that the proper degree or length ofcarriage motion .be determined. and regulated, preferably while the machine is in motion to obtain the proper relation between tool and-work.

The carriage in this type of a machine is ordinarily `vertically adjustable, which makes it necessary that the transmission connection between the carriage and crank gear,

at some point, be-ilexible or extensible to properly maintain the driving connection at all levels of the carriage work support.-

A feature of the invention of general application is the provision of the mechanism termittent motion in reverse directions, the invention -herein being particularly .adaptable ,for pro erly rotating a feed screw ofl a machine o the metalv shaping' class. n

Another object of the invention is to provide simple and eiiici'ent transmission means including feed reversing mechanism for the work table, accessible and controllable from the front or work side of the machine, the

reversing portion only of the mechanism be# lmounted upon and movablewith vthe A nimportant feature is mount the `feed changemechanism proper on the 'shaper body'instead of 4onthemovable saddle or carria Y Anti portant feature ofthe invention is the provision off a cam-as part of the means lfor regulating the operating interval of the Y lowered.

feed screw through its ratchet feed n1echa.

nism i-n forward and reverse directions for regulating the distance .of carriage feed as well as the interval .between feed rotation of 'the` carriage cross-feed shaft. The cam herein' is. designed to procure feeding action only during the return stroke ofthe .rain

and wholly 4within that stroke thus eli-mina@ ing shocks to the mechanism which are usual in other mechamsms now 1n use.

The important feature is the provision of a. multiple path cam for obtalning variation wlthout varying the lever arm lengths f or restricting the return movement of rolle-r engaging cams as heretofore -pract1ced. The

use Vof such a cam'provides positive means,

in conjunction with intermittently operable .ratchet andtransmission mechanism, for obtaining a feed movement ofthe carriage coordinate. with the return or retreat stroke of the ram, to procure the proper synchronism between the ram and table movement. ,The use of a .cam also obtains smoother action,-`

avidllg' jerky motiomv or shocks to the mechanism as a whole.

Another important feature of the invengaging roller of lthe ratchet mechanism is.Y l not disturbed when the carriage is raised and A Qther features of the invention are the: umtary assembly of the telescopic .members of the transmission system .including-the -re- 1 versing gearing housing. formed lintegral with oneof the members and the gear house' ing integral vwith the other telescopic member, as .well 4as the manner of detachably swivelling the said gear housing and detach- -ably coupling and swivelling the reversing gear housing to itscompanion housing', which in turn 4is detachably secured to the rail, wherebyv the transmissionassembly as a unit can be 'conveniently detached or replaced; whereby-'each housing is rotatable in 'I its respective bearing or mounting toY permit compensative movement when the carriage is raised-and lowered; and whereb the unit may be removed from or assembled7 upon the machine in anaxial direction.

Other objects and certain advantages will be more fully -set forth in the description of the accompanying drawin forming a part of this specification, in w ich:

Figure 1 is a lan view ot a portion of a metal shape/r inc uding the saddle and work table thereon, showing one application of my invention.

Figure 2 is a side elevation.

Figure 3 is a vertical longitudinal section on line 3--3, of Fig. 1.

Fi ure 4 is a vertical section on line Ljtm-4, of Fig. 3, illustrating the reversin mechanism and the relation thereof tot e crossfeed screw.

Figure 5 is a detail transverse section on line 5-5, of Fig. 3, illustrating the clutch.

Figure 6 is a vertical section on line 6 6, of Fig. 3, illustrating the-reversing mechanism operating shaft.

Figure 7 is a plan section on line 7-7, of Fig. 6, illustrating the construction and action of the reversing gear shifting lever.

Figure 8 is a vertical section on line 8-8 i. of Fig. 4, illustrating the manner of rotatably detachably locking the reversing gearing. housing to the rail.

' Figure 9 is a lan section on line 9 9, of Fig. 8, further lustrating this construction. Figure 10 is al vertical section through the shaper body illustrating the ram operating mechanism and stroke adjusting mechanism Y associated therewith.

Figure 11 is a vertical sectional view on line 11-11, of Fig. 1, illustrating the application of multiple path `cam and ratchet relation of the feed rack relative to the cam end the means for translating the rack.

Figure 13 is a plan section on line 13-13 of Fig. 11, illustrating Athe feed rack and Th portion of the transmission mechanism connecting the same with the reversing mechanism mounted'upon the carriage.

Figure 14 is a vertical section on line 14-14, of Fig. 11, illustrating the ratchet mechanism operated by the feed rack for driving the 'reversing ar shaft.

Figure 15, is-a deta section on line 15- 15, of Fig. 13, illustrating, the telesco ic con-l nection. between 'the housln pivo ly held respectively. on the rail andB crank hub' casing. l t.

Figure 16 is a diagrammatic view showing the contours and relation -of contours vof two of the multiple cam grooves, in relation to the feed rack roller.

Inasmuch as the invention relates articularly to the tranission connection tween the hub of the crank gear'and the carri'a cross-feed screw, no view of a Shaper in its entirety is herein shown. F' 10, however, is a cross .section of a Shaper taken through the crank gear and showing the crank gear and crank gear connection with 4the pitman, as well as the connection of the pitman'with the ram.

Referring to the drawings, the numeral 1 generally indicates the frame of the machine which is mounted on a suitable base, the upper side of the frame being provided with the usual dovetail guideway with which ythe ram 3 reciprocates in the ordinary manner. The forward end of the ram is equipped 4with a tool holder, not shown herem, and

pin block 7 mounted for' oscillation upon the crank pin 8 which in turn is slidably mounted within guides 9 integral with the crank-or bull gear 10. Thecrank gear has a tubular counterturned portion or hub 11 extending from one side thereof and journaled in the bearing sleeve 12 held non-rotatably and removably at one side of the main rame heyond which it projects, a lateral projection being provided in the frame. for this purpose, The crank pin guideway is formed y a pair of spaced, ribsterminating in a web or lug v13 forming a. bearing for supporting and journaling one end of a diametrically disposed crank pin adjusting screw 14. The screw is rotatable in its bearing and is held from longitudinal motion by suitable collars and a bevel gear 15, the collars and gear being pinned to the shaft at relatively opposite sides of the web or lug13. e screw rod has threaded engagement with the crank pin block 7 engaged in the guideways of the gear.

When the ear is rotated the pitman is oscillated in the usual manner, the degree of oscillation or length oit the ram stroke bein adjusted in the following manner: he bevel pinion 15 is in mesh with an intermediate pinion 16 journaled on a stub shaft carried by a gear` 10'adjacent the center and this pinion has in addition to bevel teeth, spur teeth meshing with corresponding spur teeth upon the end of the spindle 17 which is concentrically journaled within the crank gear hub and extends outwardly as shown in Figs. 10 and 11. The forward end 'of the spindle is journaled in a hub cap 18, (see Fig. 11), removably attached at the outer end of the hub. 'The spindle is provided intermediate its ends with a conical portion 19 frictionallv engageable with a corresponding seat inthe hub ca :tor the pur ose of normally, yieldably frictionally hol ing or clutching the spindle for rotallt) - tion with the hub baut independent e rotation, a ring being provided for holdin the sp' e in seated position.

, V`held in vthe machine frame, and hub and housing extend beyond 'the frame at one side.

- he crank gear hub extensxon 11 is rotatable in the removable bearing housing 12 (See Fi 11). The outermost extended part of t e -housin provides a chamber 2O projecting beyond t 1e end of the hub wherein are housed certain parts of thejeed mechanism including the multiple cam block and the cam operated ratchet feed and transmission mechanism.. The cap 18 engaged with the outer end' of the tubular crankv gear hub has a tubular extension 21 coaxial with the.

hub axis through which extends the stroke Y adjusting shaft 17 and splinedwithin this extension is astrokeindicator sleeve 22 in threaded engagement with the shaft 'and having circumferential `parallel rack teeth engaged by a pinion 23 of a `dial shaft 24 which is rotatable in a cap or cover34 attached to the outer end of thehub bushing 12, closing the Ichamber 20. This shaft 24 `has at its upper outer end a dial disk for indicatin the degree of stroke adjustment.

Upon l cam block 30 having substantially the form ofan oblique cylinder with parallel faces and having a plurality of peripheral parallel V-shaped grooves 31 which are also' parallel with the end faces or bases.

The peripheral contour of the grooves are herein noncircular, butl their character l or form may 'be changed to meet varying c0n' ditions of design, the object being to so form and arrange them as to obtain varying degrees o'f feed screw rotation and correspond'- ing' varying cross-feed of the work conform# able with the amount o f cut desired.-

y The use of a cam for the purpose herein,

its design, mode of attachment, `operation and function ,are important features f the invention, the results accomplished being cross-feed of the Work during the return stroke of the ram,"onlv and'exactly -during such retreat stroke. By use' of a cam of this nature in conjunction with a novel var rangement o f' a 'cam actuated'jfeed lever mounted independently at a point other than that of thev crank wheel axis, the relationship of the cam roller to the caml lis 'not changed when the work table is 'raised and loweredand, therefore, more accurate feed is obtained at alltimes. Moreover, the provision of a plurality of cams thus arranged for varying the degree of work feed eliminates the use of variablelevers wherein the length of the arms is changed, or the use 'et devices for restricting the 4returnmovements .of the cam' engaging roller. Y In the present device'a feed lever is slidably mounted Ato lpermit' the selective engagement of its ro er with any one of the e tubularexten'sion 21 is keyed-a the cross-feed screw. Moreover, if desirable,

egree of lever motion is'thereby determined l entirely by cam groove formation or cona plurality of interchangeable cam blocks may be supplied for each machine, each having a different number, arrangement and character of grooves, and each block attachable to thehub extension of the crank gear or in any other 'position for direct rotation thereby, this materially increasing .therapacity of the machine.

Below7 and parallel-with the crank hub and adjacent the cam'block is a shaft 32 Y mounted in the hub bushingv 12 at one end, Y

and held at its outer end in a removable gear and transmission housing 33, in, turn 'heldin a cap plate 34 which closes the outer chamber portion of the crank Wheel hub bushing. .The housin '33 is rotatable Within the cap 34, about t e'shaft 32, to permit vertical adjustment of thetable. The shaft 32 is suitabl machined to provide bearing surfaces. an

end adjacent its bearing a 'ratchet Wheel 36 and at'its outer end a bevelgear 37. The shaft is held from rotation and cap or gear housing held in posit-ion by a vnut 38 which -When turned to clamping vposition holds' the rotatably mounted thereon 1s a drive bushing 35 'having keyed at its inner headed end of the shaft within its seat and" 'I `thus prevents translative or rotative move- 'ment thereof.'l Rotatably mounted upon the bushing' 35 isa sleeve 39 lextending between the gear? and ratchetl wheel 3,6 and held against translation thereb This sleeve has a radially extending paw arm 40 having at its extremity a tubular rearwardly disposed extension-in which is rigidly held an elon- I gated pin or stub shaft 41' axially parallel with the axis'of the ratchet mechanism sup-v ortingfshaft 32 andv extending forwardly 1 eneaththe Shaft. l'

Mounted rotatably and translatably upon l the sleevef39 carrying the ratchet arm 40 is an element; herein called the feed rack or laterally translatable rocker, comprising fa thimble portion 42 rotatably and slidably engaged about the sleeve 39 and having two radial arms 43, 45 vsubstantially right-angularly related' 4relatively offset and disposed at the opposite extremities of the thimble. The .horizontal arm 43 is bifurcated. to form spaced arms and journaled at the outerend of'and betweenthearms is a disk or roller 44 having in this instance a convex V-shaped periphery engageable with the corresponding concave V-shaped grooves of the cam block 30. The vertical arm 45 at its -extremity has an opening slidably engaged with the stub shaft 41 the connection being in the nature of a spline whereby oscillatory movements of the feed rack are positively communicated to the ratchet sleeve, and whereby operative connection is positively maintained during selective translation of the feed rack. The rack is moreover provided with a radial. arcuate extension 46 in this case diametrically opposite the disk carrying arm and this extension is provided with circumferential rack teeth 47 4engageable by a suitable pinion 48 slidably keyed at the inner end of a shifting rod or shaft 49 rotatable in the housing and having keyed at its outer end a dial member graduated for registration with a mark on the casing, the graduations corresponding in number and positions to respective cam grooves, whereby upon rotating the shaft 49 by means of its handle the feed rack is appropriately translated forv engaging the roller '44 with the desired cam surface or groove 31 of the cam 30. The movement of the pinion 48 upon the shifting rod is positively limited in downwarddirection by a cross-pin and yieldabl limited in upward direction by a coil spring 50 interposed between and against the gear and the bearing of the operating. rod. The feed rack can thus at all times be translated during oscillation in order to be selectively 'urged toward and engaged with the cam block grooves wherewith it is yieldably maintained in the following manner:

The ratchet sleeve is provided with a radial projection 52 (see Figs. 13, 14) having a spherical depression at .its outer end with which is engaged the spherical head of a plunger-like element 53 providing an abutment ange 54 intermediate its length and aving its other extremity provided with a spherical enlargement reciprocal in a tubular vbushing 55, said bushing being removably attached in the wall of the housmg. An expan'sion sprin 56 is interposed between the flange and t e bushing for forcing the plunger in a direction to yieldably maintain the disk wheel 44 in engagement with a cam block groove.-

The ratchet mechanism is for the `purpose of obtaining an intermittent rotary motion of the ratchet and bevel gears, positively in one direction, as the result of the oscillatory motion of the feed rack, this positive feed herein taking place as the lever moves in a. downward direction indicated by the arrow in Figs. 12 and 16, the direction of the cam block rotation being indicated by an arrow in Fig. 16.

In order to obtain this intermittent feed of the gear shaft, the arm is broadened as shown in Fig. 14 and one side of the tubular extension is iattened to provide a rin socket and abutment. To this broa ene portion is pivoted a's ring pressed pawl 58 aving terminal rate et teeth, in this instance three in number, engageable with the teeth of the ratchet wheel 36 keyed to the driving bushing whereby as the feed rack is oscillated the driving bushing is intermittently driven in forward direction in order to correspondingly rotate the cross-feed screw. Reverse motion of the driving bushing is prevented by a lurality of lever pawls 59 mounted for oscil ation upon. a pivot 60 removably but firmlyl held inthe caslng and extending outwardly therefrom, said pivotl having integral therewith a plate or disklike flange 61 from which projects a. pin against which are engaged the endsof three springs 62 coiled about another pin projecting from the casing and having their opposite ends socketed 1n the non-engaging arms of the pawl. The teeth 63 `of the pawls have an offset or staggered relation peripherally, the total amount of offset bein equal to one tooth length of the ratchet w eel, thus obtaining constant pawl engagement without loss of motion and makin for perfect intermittent ratchet drive. he arrangement of the pawl upon the pin provides a conveniently attachable and detachable unit.

Referring to the diagram of Fi which the paths of the first an last cam re 16, in

grooves or surfaces only are represented,

correspondin to maximum and minimum cross-feed; t e portions of the grooves between the oints H, L correspond to the feeding stro e of the ratchet mechanism. As point H travels toward L in the direction of the arrow, the ratchet shaft is rotated in clockwise direction and the work is fed. The skewed relation of the cam O'rooves or sur- 'faces is to compensate for the rotary path of the feed rack roller to reserve the proper anism, such telescopic arrangement being necessary because of the vertical movements of the carriage. A description of the mechanism mounted on the carriage will now be given and thereafter the arrangement for transmittingly connecting the same with the ratchet mechanism.

The saddle 70 is shown mounted upon vertical ways 71 of the machine body and one form of table or' carriage 7 2 is shown gibbed to the saddle ways. The cross-feed screw 73 is rotatabl non-translatably mounted and operates in t e usual manner when rotated to traverse the work table. The saddle is extended and isbored as at 74 in its outer.y

end face concentrically with the feed screw axis. Within thsbore is engaged a tubular extension 75 of a gear housing 76 to which the reversing gear housing 77 is detachably:

swivelled. Thefirst housing 76 is non-rotatably attached to the saddle byscrews, its configuration being` best shown in Figs. 4 and 8 The housing comprises a hollow body portion having an attaching flange extending laterally therefrom. A removable cover 7 8 is described attached to the upper side and has a depending projection 79 adapted to engage and retain a gear 80 at the extremity of the reversing driving sleeve 81 in a manner more fully Thel outer wall of thev ereafter. housing 1s provided with a circular bearing opening 82 having segmental arcuate diametrically related locking lflanges 83 interiorly thereof adapted for engagement by corresponding grooves 84 formed circumferentially. of a short tubular extension of the reversing mechanism housing 77, wherebythe houslng can be engaged with or disengagedQ from the first mentioned housing and locked rotatively or swiveled thereto, to permit rotative or compensative adjustment etween the housings when the saddle is raised or lowered. fBy rotating the outer housing to an angleof 180 from the position shown in the figures, the grooves may be disengaged .from the flanges and the housing can be removed. This construction provides means whereby the housing can be securelyrotatably locked in `operative position. A

In assembling the telescopic portion of the mechanism the'bearing element76 properly engaged withthe housing by turningv the same to a position in which the grooved portion of the housing may be inserted within'the bore 83' after which the element 76 is rotated through anangle 'of approximately 180 to bring the arcuate projections into locking position within the slots. After this operation the element 7 6- is fastened to the saddle by screws, as shown in Fig. 8.

The reversing gearing housing v77 has alaterally substantially horizontally disposed 'tubular extension 85 integral therewith, into which is telescopically litted a correspondingl tubular extension 86 of the gear housing 33,

. and, each extension is suitabl machined to provide internal bearing sur aces for'jour- .naling correspondingly telescopically related transmission elements, one a shaft and the4 other a sleeve. This telescopic arrangement allows the extension of the-transmission elements when the saddle is raised or lowered froma mid-position in which the connecting elements are in a horizontal position-and the extension 85 is provided with means for suit- .ably adjusting the degree of friction between the telescopic sections.

The cross-feed shaft 7 3 is journaled in the \-translative disengagement of the sleeve from the shaftcastellations. When, however, the cover is removed the sleeve can be translated outwardly to disengage the grooves from the shaft eastellations for certain purposes, one

of which is to interrupt transmission connec-4 tion between the crank shaft and the crossfeed screw. The sleeve may howeverbe nontranslatably keyed to the feed shaft in the Aordinary manner.

` Splined midway 4of the sleeve is a reversing clutch element 92 adapted for alternate clutch engagement withbevel gears 937 94, rotatably mounted upon the sleeve and oonstantly in mesh with a driving gear 95 keyed to a tubular sleeve having an enlarged chamber-like extension 97 at the opposite side of its bearing for the attachment and housing of a safety lclutch described hereafter.

The clutch collar 92 is -centrally grooved and has engaged therewith a pin at one end of the shifter lever 98 (see Figs. 3 to 7 inclusive) centrally pif-voted to the bottom of.

the housing. The opposite end of this-lever is slotted to provide fingers and engaged between the fingers is an eccentrically disposed pin 100 projecting downwardly from a vertically disposed shifter shaft 101- journaled in the housing and having its operating handle at its .upper end. In order to lockl the shaft in positions corresponding to for- `ward, reverse and neutral positions of the clutch the same near its bottom end is p rovided with three grooves 102 corresponding ear 80- at its inner` to the three positions of the clutch collar and engaged with these grooves is aspring pressed ball detent 103 translatably and removably held/in the bore of the housing. Suitable. marks may be provided uponthe able with a mark onl the housing to indicate the various positions of the clutch member.

. The feed shaft 73 extends beyond the housing and is counter-turned and s uared .to provide a wrench engaging surface y which means the shaft may be manually rotated.

.115 upper end vof the operating vshaft register- The shaft is shouldered as at 104 and has pinned thereto a retaining sleeve 105 en- L gaged 'against the shoulder and outer face of the housing and upon the sleeve is adj ustably; rotatably mounted a dlal 106 which may be set in any desired angular relation to the shaft and lockedin said position by ab they screw. 107. The.v dial yis peri herally graduated, said graduations being registerable with a mark on the housing.

Driving connection betweenthe sleeve 9G i` having a. bevel gear 109 in mesh with the bevel gear 37. This shaft is provided with keyways 110 at its other end and is translatably disposed within the bushing or sleeve 96. Slidably keyed to the shaft by means of the keyways are a plurality of friction disks 111 alternating lwith similar disks 112 slidably keyed within the enlarged or chambered portion 97 of the sleeve. The disks are held from translative movement within the sleeve by a' nut 113 having threaded engagement with the sleeve and an expansion spring 114 surrounds the shaft and is interposed between the end disk and the sleeve shoulder or end wall 115 to exert a predetermined'pressure upon the disk sufliciently only to maintain driving connection for( ordinary transmission strains but adapted to permit slippage of the clutch disks upon one another when undue strains are put upon the transmission mechanism.

It will also be notedthat by arranging the feed rack 42- and ratchet driven sleeve 39 upon an axis other than the crank wheel axis, and by having a swiveled transmission connection between the sleeve and carriage, the relationv of the feed rack to the cam is not disturbed by vertical movements of the saddle and therefore no compensative adjustments for this purpose are necessary as is the case of machines now in use.

Having described my invention, I claim:

1. In a metal shaping machine, a ram, a crank gear therefor, 4a carriage crOSS-feed screw, a multiple cam rotatable with said crank gear, a ratchet feed transmission mechanism connecting said cam andcross-feed screw including a rocker member engaging said cam, and laterally translatable across said vcam for selective engagement with the various cam surfaces, to obtain the varying degrees of feed screw rotation in synchronism with the ram.

2. lIn a metal shaping machine, a ram, a crank gear therefor, having a Vhubextension, a multiple cam rotatable with said extension, having cam surfaces eccentric to theI crank gear axis, a carriage cross-feed screw intermittently operable transmission mechanism connecting said cam and cross-feed screw including a rocker member engaging said cam and laterally translatable across said cam for selective engagement with the various cam surfaces to obtain varying degrecs of feed screw motion in synchronism with the ram.

3. In a metal shaping machine, a ram, a crank gear therefor, a carriage cross-feed screw, a multiple cam rotatable with said therewith, a

gear and transmission mechanism connecting said cam and cross-feed screw, including a rocking element adapt-ed when oscillated to intermittently drive said transmission. mechanism in forward direction, and laterally adjustable for selective engagement with the various .cam surfaces toobtain varying degrecs of feed screw motion in synchronism with the ram.

4:. In a device of the class described,`a ram, a crank gear operatively connected therewith, a multiple cam movable inunison with the crank gear having a plurality of cam surfaces of varying contour, a rocker member adapted to be laterally translated for engagement with a selected cam surface of said cam for oscillation thereby, a cross-feed screw shaft, and transmission ratchet mechanism transmittingly connecting with said screw shaft said ratchet mechanism operable by said rocker member to obtain positive feed rotation of the shaft, when the rocker member is oscillating in one direction by. any cam surface.

5.. In a device of the class described, a ram, a crank-gear therefor, a cam movable in unison with the crank gear, havin a plurality of cam faces, a rocker mem r laterally ad'ustable for selective engage- 'ment with t e cam surfaces for oscillation thereby, a cross-feed shaft and intermittently. operable'v transmission ratchet mechanism transmittingly connecting `with said shaft said ratchet mechanism operable by said rocker member to obtain positivefeed rotation of the shaftl when the rocker member is oscillated in one direction by any cam surface.

6. In a device of the class described, a ram, a crank gear operatively connected therewith,l a cam movable in unison with the gear having a plurality of cam surfaces of varying contour, a rocker member laterally translatable for selective engagement with the cam surfaces for oscillation there-l positivev feed rotation of the screw shaft when the rocker member is scillated in one direction by any cam surface.'

7.v In a device of the class described, a ram, a crank .gear operatively 'connected carriage cross feed screw, a cam rotatable in unison with the crank gear having a lurality of circumferential cam surfaces o varying contour and eccentric to the crank gear axis a rocker member independently mounte ada ted to be selectively translated axially yo the Acam for en-y gagement with its surfaces for oscillating the rocker member, a cross-feed shaft, transmission -ratchet mechanismv transmittingly connecting with said cross feed screw and operable by said rocker member to obtainpositive feed rotation of the screw when said rocker member is oscillated in one direction by any cam surface.

8. In a device of` the class described, a

ram, a crank gear operatively connected therewith, a cam movable in unison with the crank gear having a plurality of circumfeb' ential parallel cam surfaces of varying contour and eccentric to the crank gear axis, a rocker member adapted to be selectively translated axially of the cam for engagement with the cam surfaces for oscillating the rocker member, a cross-feed screw and Ytransmission ratchet mechanism connecting with said screw and operable by said rocker vmember to obtain. positive feed rotation of grooves of irregular contour and eccentric to the crank gear axis, a ratchet transmis sion mechanism including a rocker member 'having a roller thereon adapted for selective engagement with the grooves ofthe cam, and further adapted when oscillated iii one direction to obtain positive feeding action of the transmission mechanism for operating the feed screw.'

10. In a device of the class described, a

feed screw, a ram, a crank gear operatively connected with said ram, a multiple cam rotatable with the gear, a stationary shaft, a sleeve rotatable thereon having a ratchet wheel and a gear keyed thereto, a second sleeve rotatable upon said first sleeve having a feed pawl engageable with said ratchet wheel, a second pawl for preventing reverse sleeve movement, a rocker member slidable` upon said second sleeve adapted to rock thereon, said rocker member selectively en-A gageable Ywith the surfaces of said cam for 'rocking the rocker member, an element slidably connecting said rocker :member and second sleeve whereby said sleeve is rotatably oscillated with said rocker member .nd whereby said connection is-maintained at all positions of the rocker member, and transmission mechanism connectin the gear of\ said first sleeve `with said feed screw.

11'. Ina device of the class described, .a crank gear, -a cam element movable in unison therewith having a plurality of circumi. ferential cam faces of varying contour, a rotatably mounted transmissionv element, a rocker member pivoted thereto and slidable thereon adapted to engage with any face of said cam, ratchet mechanism connecting said rocker member and rotatable element vfor procuring positive intermittent rotation in one direction when said rocker member is oscillated, a cross-feed screw, and 4transmission` mechanism connecting said rotatable element with said feed screw. i

12. In a shaper, a table carrying cross rail,fa table cross feed shaft,'a driving shaft parallel' with the cross feed shaft, a 'secvtional shaft. in eared connection with said cross feed and. fiving shafts, and compressively engaged friction disks4 for transmittingly connecting the sections of said sectional shaft' and' automatically'releasing the transmitting connection under excessive counter, torque strains of said sections.

In witness whereof,.1 hereunto subscribe my name.l

. f ROBERT 'I'.l HAZELTON. 

